Window lock



April 13 1926. 1,580,876

L. WlSLOCKl WINDOW LOOK Filed Dec. 2'7, 1924 lNVENTOR Qwm mm idatcntedApr. 13, 1926.

Unitas srATE-fs LEON WISLOCKI, F NEV] YORK, N. Y.

WINDOW LOCK.

Application filed December 27, 1924. Serial No. 758,339.

To ail whom it may con-0cm:

Be it known that 1, Leon lVisLooni, a citizen of Poland, residing at NewYork city, in the county of New York and State of New York, haveinvented certain new and useful Improvements in lWindow Locks, of whichthe following is a specification.

This invention relates generally to window locks, having more particularreference to a window lock arranged for application to the window at thetime it is desired to lock the latter and which is capable of ready application to and removal from the window.

The invention has for an object the provision of a simple and novel lockof this .sort

which operates by causing the window sash to bind or wedge against theframe it' an attempt is made to open the window when the lock is appliedto the latter.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

Fig. 1 of the drawing is a perspective view showing my improved lockapplied to awindow.

Fig. 2 is a vertical sectional view showing the lock in position on thewindow, the lock being shown in elevation. this view being taken on theline 22 of Fig. 3.

Fig. 3 is a horizontal sectional view taken on the line 33 of Fig. 2. i

Fig. 4 is a detail perspective view of the lock.

Fig. 5 is a face view of the blank from which the lock is formed.

Fig. 6 is a similar View to Fig. 2 but showing a modified constructionof look.

In constructing my improved window lock 1 form a sheet metal blank suchas is shown generally at 10 in Fig. 5 of the drawing, which tapers fromend to end thereof as shown, and has the pairs of teeth or spikes 11 and12 projecting from the sides and front thereof respectively. This blankis bent, along the dotted lines 14: shown in Fig. 5, to the form shownin Fig. 4 to comprise a central elongated body member 10 and the sideflanges or walls 1O which extend at right angles to the said centralmember. It will be noted that the lines l l start from the narrow end ofthe blank at the corners of the latter, and diverge slightly from oneanother toward the other end of the blank, the divergence of the lines14 being less, however, than that of the two sides of the blank from oneanother. The result is that when the blank is bent as above describedthe flanges 10* decrease in depth from one end of the lock to the other,while the lock tapers from the first mentioned end toward the other end.A wedge element which tapers both of its face and sides is thus formed.

In applying my improved lock to a window the lock is engaged with one ofthe sash retaining strips 16 ot' the window above the sash 17, beingretained in position by the engagement of the spikes 11 and 12 in thesaid strip. If an attempt is made to open the window the sash bears onthe face of the lock and is thereby forced laterally to bind or wedge atits opposite side against the ad jacent side of the window frame.

In the form of the device shown in Fig. 6 of the drawing the lock isconstructed in the main as above with the body member 10, side flangessuch as 10, and spikes 11 and 12. In this case the central member 10 is6X- tendcd at the entering or narrow end of the lock in the form of ahook 20 which engages in an undercut recess 21 in the sash.

the top wall of this recess being here formed by a plate 22 fixed to thetop of the sash. Attached at one end to this plateis a flat spring 23which extends upwardly there from, and bears on the body of the lock,causing the spikes 11, 12 to be pressed lightly against-the -frame strip16. With this arrangement the window can be readily locked in partiallyopen position without forcing the spikes into the strip 16. If, in aclandestine attempt to open the window, the sash 17 be first pulleddownward, the lock will follow the sash and reengage when a new attemptis made to raise the sash. As will be apparent, the lock may be read.-ily removed from the sash by swinging it on the corner of the latter thespring 23 yielding to permit of this action. Replacement of the lock iseffected in like manner.

Having thus described my invention, what I claim as new and desire toprotect by Lettei's Patent of the United States is as follows A windowlook comprising a wedge eleinent side flanges formed with said element,spikes or spurs formed with said flanges adapted to engage the windowframe, a hook extension formed with the lower end of said elementadapted to engage an undercut recess in the window sash, and a springhearing on said lock for causing said spikes to enter the window frameupon an attempt to open the window.

In testimony whereof I have aflixed my signature.

LEON W ISLOCKI.

